I the following statements about genetic exchange in bacteria is NOT true? a Plasmids do not have to integrate into the host cell chromosome in order to be replicated. b.ln conjugation, there has to be a physical connection between the donor cell and the recipient cell c ln the process of conjugation, the donor cell is dead and the recipient cell is alive Od. Antibiotic resistance genes could be transferred fr

I the following statements about genetic exchange in bacteria is NOT true? a Plasmids do not have to integrate into the host cell chromosome in order to be replicated. b.ln conjugation, there has to be a physical connection between the donor cell and the recipient cell c ln the process of conjugation, the donor cell is dead and the recipient cell is alive Od. Antibiotic resistance genes could be transferred fr

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter17: Bacterial And Viral Genetics

Section: Chapter Questions

Problem 1TYK

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A) A bacterium that has an F plasmid is able to do which of the following? Group of answer choices resist antibiotics survive in very harsh environments such as hypersaline lakes grow a cell wall form conjugation tubes and pass on their DNA to other bacteria reproduce sexually B) horizontal gene transfer refers to bacteria's ability to Group of answer choices make peptidoglycan for their cell walls transfer DNA to offspring, or "daughter" cells transfer DNA only when on horizontal surfaces, such as a table top transfer pieces of DNA to other cells in the population engage in mutualisms with certain species
Which of the statements is TRUE about conjugation? a) Plasmid DNA is transferred from a donor (F+) cell b) It may only be performed by competent cells c) DNA is always integrated into recipient chromosome d) It may be specialized or generalized
The difference between transformation and conjugation in bacteria consists of the fact that: a. only transformation involves the presence of a plasmid b. only conjugation involves the presence of a plasmid c. only conjugation involves the presencce of a sex pilus d. both answers b and c are correct e. none of the above answers arre correct
Which of the following statements is false? a. Plasmids can be exchanged between different species of bacteria. b. The blue circle represents a small chromosome. c. The blue circle is a plasmid that contains genes that confer resistance to specific antiobiotics. d. The blue circle represents a double-stranded molecule of DNA.
Choose the one answer that fits best. Which of the following statements regarding bacteria is NOT correct? a. During conjugation, two bacteria exchange genetic information directly via pili b. Bacterial populations have a higher mutation rate because their DNA Polymerases do not have proofreading capability c. Bacterial growth by binary fission is exponential and each division usually takes only a couple of hour or less d. Plasmids carry just a few genes and are replicated independently from the bacterial chromosome e. Cocci that are arranged in clusters/bunches are called staphylococci
With regard to conjugation, a key difference between F+ and Hfrcells is that an Hfr cella. is unable to conjugate.b. transfers a plasmid to the recipient cell.c. transfers a portion of the bacterial chromosome to the recipient cell.d. becomes an F− cell after conjugation.
Which of the following is true about plasmids?a) They are present in all organismsb) They are present in bacteria onlyc) They are present in bacteria and phagesd) They are present in plants and animals
Researchers studying the bacterium Escherichia coli split a population of the bacteria into two samples. Sample 1 was transformed with a plasmid containing a gene that makes the bacteria resistant to the antibiotic kanamycin. Sample 2 was transformed with a plasmid lacking the antibiotic resistance gene. A portion of each sample was then added to growth plates containing just nutrients or growth plates containing nutrients and kanamycin. After being allowed to grow for 24hours at 37∘C, the number of colonies on each growth plate was counted (Table 1). Which of the following claims is best supported by the data in Table 1 ? a.More bacteria on plates 1 and 2 were successfully transformed than on any other plate. b.Only the bacteria that were successfully transformed with the kanamycin resistance gene grew on plate 4. c.The transformation procedure killed all the bacteria that were added to plate 3. d.None of…
Which of the following statements about Hfr strains of E. coli is FALSE? Group of answer choices Hfr stands for "high frequency recombination" In Hfr strains, the F factor is integrated into the main bacterial chromosome The location and order of genes along the chromosome can be mapped using the time of transfer of different marker genes. Genetic exchange between Hfr and F− strains is studied using the interrupted mating technique In Hfr strains, the F factor is integrated into a plasmid
In Hershey and Chase’s experiment investigating which biological molecule carries genetic information, they found that phage DNA with radiolabeled phosphorus was retained in bacterial cells after transduction. To conclude that DNA is the genetic material, what assumption did they have to make? A. Protein does not enter the bacterium during transduction. B. DNA does not stay in the media after transduction. C. All of the phage DNA was radiolabeled. D. Bacteria can be transduced by phage.
Which of the following statements is false? a) the bacterial chromosome is usually circular b) the bacterial chromosome has a single origin of replication c) the bacterial chromosome consists of a single molecule of DNA d) plasmids are small DNA molecules that occur in bacteria but are not essential - for normal function. e) Most bacterial genomes consist of fewer than 1,000 genes
A plasmid differs from the bacterial chromosome in that it is __________. A. significantly smaller B. always found as a single copy of DNA in a cell C. circular D. double-stranded A. significantly smaller B. always found as a single copy of DNA in a cell C. circular D. double-stranded